[Twisted-Python] Example of a long-polling asynchronous web servic?

[Stephen Mattison]

Hey guys I'm trying to implement some web-services over JSON-RPC, and one of
the methods needs to use server-push.

I will try and explain my problem as well as I can.

I have a client, which is an iPhone, natively running a JSON-RPC( or XML-RPC
) client implementation.

I need to do something like this from the iPhone

service = ServerProxy("http://mydomain.com/webservice")
init_data = service.subscribe_to_updates()
...
...
...
some_result = service.some_regular_function(params)

How can I implement this in Twisted?
-- 
Stephen Mattison
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